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Clinical Challenge | Pathology

A Mass Involving the Buccal Branch of the Facial Nerve QUIZ

Antoni De Mol, MD, DDS1; Raf Sciot, MD, PhD2; Constantinus Politis, MD, DDS, MM, MHA, PhD1,3
[+] Author Affiliations
1Department of Oral and Maxillofacial Surgery, KU Leuven, University Hospitals Leuven, Leuven, Belgium
2Department of Pathology, KU Leuven, University Hospitals Leuven, Leuven, Belgium
3Department of Imaging and Pathology, OMFS IMPATH Research Group, Leuven, Belgium
JAMA Otolaryngol Head Neck Surg. 2016;142(2):187-188. doi:10.1001/jamaoto.2015.3077.
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A 14-year-old girl had an asymptomatic, painless, slowly growing, invisible but palpable nodule in the cheek, and, after excision, light microscopy showed a septated, multilobular lesion with a myxoid stroma, cell nesting, and variable cellularity. What is your diagnosis?

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A, Ultrasonographic image of the left cheek . B, Hematoxylin, original magnification ×50. C, The tumor immunostained with NKI/C3 antibodies (dark signal).

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